Running Head: PART 4 TOPIC 4 QD21Part 4 Topic 4 QD 2NameInstitutional AffiliationDate2PART 4 TOPIC 4 QD2Part 4 topic 4 QD 2Levels of evidenceA researcher can classify the evidence to use in a given study into three different groups.These groups define the kind of information that each stage or level contains. The three primarycategories include the filtered, unfiltered and finally, the expert opinion. The first three levels ofevidence which include systemic reviews, evidence synthesis, and article synopsis containfiltered information. Some of the most common standards of evidence may consist of systemicreviews which comprise analysis given by a given expert in the respective area of study. Thesecond level provides meta-analysis which contains and presented information from publishedstudies. These studies refer to the previously completed pieces of research performed ...
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